content: package com.www.controller;
  
  import cn.hutool.core.date.DateUnit;
  import cn.hutool.core.date.DateUtil;
  import cn.hutool.json.JSONObject;
  import com.alipay.api.AlipayApiException;
  import com.alipay.api.AlipayClient;
  import com.alipay.api.DefaultAlipayClient;
  import com.alipay.api.internal.util.AlipaySignature;
  import com.alipay.api.request.AlipayTradePagePayRequest;
  import com.alipay.api.request.AlipayTradeRefundRequest;
  import com.alipay.api.response.AlipayTradeRefundResponse;
  import com.www.config.alipay.AliPay;
  import com.www.config.alipay.AliPayConfig;
  import com.www.mapper.SysOrderMapper;
  import com.www.pojo.SysOrder;
  import com.www.service.SysOrderService;
  import com.www.vo.Result;
  import io.swagger.annotations.Api;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  
  import javax.annotation.Resource;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.util.Date;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * @Author Alin
   * @date 2024/5/3 003 16:14
   * @Description:
   */
  // 支付账号：bcvqkw6031@sandbox.com   密码：111111
  @RestController
  @Api(tags = "沙箱支付")
  @RequestMapping("/alipay")
  public class AliPayController {
      //        private static final String GATEWAY_URL = "https://openapi.alipaydev.com/gateway.do";
      private static final String GATEWAY_URL = "https://openapi-sandbox.dl.alipaydev.com/gateway.do"; //沙箱环境
      private static final String FORMAT = "JSON";
      private static final String CHARSET = "UTF-8";
      //签名方式
      private static final String SIGN_TYPE = "RSA2";
  
      private final SysOrderService sysOrderService;
  
      @Resource
      private AliPayConfig aliPayConfig;
      @Resource
      private SysOrderMapper sysOrderMapper;
  
      public AliPayController(SysOrderService sysOrderService) {
          this.sysOrderService = sysOrderService;
      }
  
      @GetMapping("/pay") // &subject=xxx&traceNo=xxx&totalAmount=xxx
      public void pay(AliPay aliPay, HttpServletResponse httpResponse) throws Exception {
          // 1. 创建Client，通用SDK提供的Client，负责调用支付宝的API
          AlipayClient alipayClient = new DefaultAlipayClient(GATEWAY_URL, aliPayConfig.getAppId(),
                  aliPayConfig.getAppPrivateKey(), FORMAT, CHARSET, aliPayConfig.getAlipayPublicKey(), SIGN_TYPE);
  
          // 2. 创建 Request并设置Request参数
          AlipayTradePagePayRequest request = new AlipayTradePagePayRequest();  // 发送请求的 Request类
          request.setNotifyUrl(aliPayConfig.getNotifyUrl());
          request.setReturnUrl(aliPayConfig.getReturnUrl());
          JSONObject bizContent = new JSONObject();
          bizContent.set("out_trade_no", aliPay.getTraceNo());  // 我们自己生成的订单编号
          bizContent.set("total_amount", aliPay.getTotalAmount()); // 订单的总金额
          bizContent.set("subject", aliPay.getSubject());   // 支付的名称
          bizContent.set("product_code", "FAST_INSTANT_TRADE_PAY");  // 固定配置
          request.setBizContent(bizContent.toString());
  
          // 执行请求，拿到响应的结果，返回给浏览器
          String form = "";
          try {
              form = alipayClient.pageExecute(request).getBody(); // 调用SDK生成表单
          } catch (AlipayApiException e) {
              e.printStackTrace();
          }
          httpResponse.setContentType("text/html;charset=" + CHARSET);
          httpResponse.getWriter().write(form);// 直接将完整的表单html输出到页面
          httpResponse.getWriter().flush();
          httpResponse.getWriter().close();
      }
  
      @PostMapping("/notify")  // 注意这里必须是POST接口
      public String payNotify(HttpServletRequest request) throws Exception {
          if (request.getParameter("trade_status").equals("TRADE_SUCCESS")) {
              System.out.println("=========支付宝异步回调========");
  
              Map<String, String> params = new HashMap<>();
              Map<String, String[]> requestParams = request.getParameterMap();
              for (String name : requestParams.keySet()) {
                  params.put(name, request.getParameter(name));
                  // System.out.println(name + " = " + request.getParameter(name));
              }
  
              String outTradeNo = params.get("out_trade_no");
              String gmtPayment = params.get("gmt_payment");
              String alipayTradeNo = params.get("trade_no");
  
              String sign = params.get("sign");
              String content = AlipaySignature.getSignCheckContentV1(params);
              boolean checkSignature = AlipaySignature.rsa256CheckContent(content, sign, aliPayConfig.getAlipayPublicKey(), "UTF-8"); // 验证签名
              // 支付宝验签
              if (checkSignature) {
                  // 验签通过
                  System.out.println("交易名称: " + params.get("subject"));
                  System.out.println("交易状态: " + params.get("trade_status"));
                  System.out.println("支付宝交易凭证号: " + params.get("trade_no"));
                  System.out.println("商户订单号: " + params.get("out_trade_no"));
                  System.out.println("交易金额: " + params.get("total_amount"));
                  System.out.println("买家在支付宝唯一id: " + params.get("buyer_id"));
                  System.out.println("买家付款时间: " + params.get("gmt_payment"));
                  System.out.println("买家付款金额: " + params.get("buyer_pay_amount"));
  
                  // 查询订单
                  SysOrder sysOrder = sysOrderMapper.findByOrderNo(outTradeNo);
  
                  if (sysOrder != null) {
                      sysOrder.setAlipayNo(alipayTradeNo);
                      sysOrder.setUpdateTime(new Date());
                      sysOrder.setPaymentTime(new Date());
                      sysOrder.setStatus(1);
                      sysOrderService.updateById(sysOrder);
                  }
              }
          }
          return "success";
      }
  
      @GetMapping("/refund")
      public Result returnPay(AliPay aliPay) throws AlipayApiException {
          // 7天无理由退款
          String now = DateUtil.now();
          SysOrder sysOrder = sysOrderMapper.findByOrderNo(aliPay.getTraceNo());
          if (sysOrder != null) {
              if (sysOrder.getStatus() == 0) {
                  return Result.fail("订单还未支付");
              }
              // hutool工具类，判断时间间隔  如果数据库存时间字段是string类型，就用第一行
              // long between = DateUtil.between(DateUtil.parseDateTime(sysOrder.getUpdateTime()), DateUtil.parseDateTime(now), DateUnit.DAY);
              long between = DateUtil.between(sysOrder.getUpdateTime(), DateUtil.date(), DateUnit.DAY);
              if (between > 7) {
                  return Result.fail("该订单已超过7天，不支持退款");
              }
              if (sysOrder.getStatus() == 2) {
                  return Result.fail("订单已经退款");
              }
          }
  
          // 1. 创建Client，通用SDK提供的Client，负责调用支付宝的API
          AlipayClient alipayClient = new DefaultAlipayClient(GATEWAY_URL,
                  aliPayConfig.getAppId(), aliPayConfig.getAppPrivateKey(), FORMAT, CHARSET,
                  aliPayConfig.getAlipayPublicKey(), SIGN_TYPE);
          // 2. 创建 Request，设置参数
          AlipayTradeRefundRequest request = new AlipayTradeRefundRequest();
          JSONObject bizContent = new JSONObject();
          bizContent.set("trade_no", aliPay.getAlipayTraceNo());  // 支付宝回调的订单流水号
          bizContent.set("refund_amount", aliPay.getTotalAmount());  // 订单的总金额
          bizContent.set("out_request_no", aliPay.getTraceNo());   //  我的订单编号
  
          // 返回参数选项，按需传入
          //JSONArray queryOptions = new JSONArray();
          //queryOptions.add("refund_detail_item_list");
          //bizContent.put("query_options", queryOptions);
  
          request.setBizContent(bizContent.toString());
  
          // 3. 执行请求
          AlipayTradeRefundResponse response = alipayClient.execute(request);
          if (response.isSuccess()) {  // 退款成功，isSuccess 为true
              System.out.println("调用成功");
  
              // 4. 更新数据库状态
  //            sysOrderMapper.updatePayState(aliPay.getTraceNo(), "已退款", now);
              sysOrder.setUpdateTime(new Date());
              sysOrder.setStatus(2);
              sysOrderService.updateById(sysOrder);
  
              return Result.success("退款成功");
          } else {   // 退款失败，isSuccess 为false
              System.out.println(response.getBody());
  //            return Result.error(response.getCode(), response.getBody());
              return Result.fail(response.getBody());
          }
  
      }
  
  
  }
  